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If the four points A (2-x, 2, 2), B (2 ,...

If the four points A (2-x, 2, 2), B (2 , 2 - y, 2), C (2, 2, 2 - z) and D (1 , 1, 1) are co-planar, then

A

`1/x+1/y+1/z=1`

B

x+y+z=1

C

`1/(1-x)+1/(1-y)+1/(1-z)=1`

D

`xy+yz+zx=1`

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The correct Answer is:
A
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